Duplicating-stamp.



E. D. BOSWORTH & A. C. STALEY.

Patented Feb. 21, 1911.

cm, WAINIIGTON. u. :4

UNITED STATE$PATENT OFFICE.

EUGENE I). BOSWORTH AND AMOS C. STALEY, OF CHICAGO, ILLINOIS.

DUPLICATING-STAMR Specification of Letters Patent.

atented .lreb. 21, 1911.

Application filed April 5, 1910. Serial No. 553.651.

T 0 all whom it may concern:

3e it known that we, Enouxn I). Boswon'rn and 1\)[US C. S'LAnnr. citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Duplicating-Stamps, of which the following is a specification.

Our invention relates to improvements in hand stamps, and has for one of its objects to provide a duplicating hand stamp for imprinting a signature or the like, capable of making a series of impressions, and capable of being cleaned and used to imprint other signatures or like matter.

Another object of our invention is to provide a hand stamp of such character that the user may quickly and conveniently make, adapt, and arrange the printing matter on the face of the printing stamp, and as quickly remove the printing matter therefrom and substitute therefor any other such matter as may be desired.

It frequently happens in business transactions that a signature, phrase, or other notation is required to be imprinted a. large number of times on as many documents or instruments, and that a delay necessary for the construction of a rubber tace stamp is not permissible. To meet such contingencies, our invention is especially valuable. And still a further object of our invention is to provide in a stamp of the character described, a. matrix for holding the plastic material of which the stamp is in part composed, so constructed and arranged that it may be quickly and uniformly reduced in depth to compensate for the wearing away of the plastic substance.

Other and further objects of our invention will become apparent to persons skilled in the art from the specification taken in con junction with the drawing, wherein Figure 1 is a side elevation of a hand stamp partly in section; and Fig. 2 is a plan View of the matrix showing the method of reducing its thickness.

In all of the views, the same reference characters indicate similar parts.

5 is an ordinary wood-turned handle, such as used generally on rubber faced stamps. Secured to the small end of the handle is a flat base plate, 6, preferal'ily of wood or like material. A matrix, 7. for holding the gelatinous composition, 8, is made of a series of relatively thin frames, such as paper, or

other suitable like material. The matrix is made by superposing one frame or lamina upon another, and gluing, or otherwise cementing. :uljacent laminae together until a matrix of desired thickness has been built up. The matrix, as a whole, is then, in like manner, cemented to the base plate. (3. The matrix is now tilled with a suitable gelatinous material, 8, capable of receiving luplicating ink and making a large number of impressions therefrom. \Vhen it; is desirable to duplicate a signature for instance by making a number of impressions thereof, the signature is written with the duplicating ink on paper: the stamp then firmly pressed over the signature until the sensitive surface has absorbed substantially all of the ink. The stamp is then removed and it is in condition to make a large number of duplicate impressions of the said signature.

The face of the stamp may be washed in fresh water. and the signature thus removed, and it will then be ready to receive another signature or the like. In this manner the stamp may be used on many occasions and from time to time for a large variety of signatures, or other such brief notations or phrases, and may be prepared for such service quickly and with very little expense or inconvcnienceto the user.

The yielding, plastic. printing material, 8. is subject to wear. lVhen its printing surface has been worn by use too close to the lower surface of the matrix 7, one or more laminae or layers of the paper frame may be removed by the application of a penknit'e. 9. under one or more layers, 7, as shown in Fig. 9. and the thickness of the matrix may thus be uniformly reduced substantially proportiomil to the wear of the printing substance.

Having thus described our invention, what we claim is:

1. As an article of manufacture, a multicopying hand stamp. consisting of a handle, a flat base plate carried thereby, printing material and an enveloping frame underlying said base plate and substantially co-extensive therewith and attached at all points directly to the base plate, said frame comprising su wrposed separable laminae, each parallel to the base plate throughout its entire extent and each surrounding a portion of the printing material.

As an article of iminufacture, a multicopying hand stamp, consisting of a handle,

a frame or matrix secured directly to the reduction of the depth of the matrix by sucunder side of said base plate at all points, cessive removal of 12111111186.

a base plate secured to the bottom thereof, gelatinous body being attainable by physical and constituting a solid immovable edge In testimony whereof We hereunto set our l 5 Wall, said matrix being composed of a pluhands.

rality of separable parallel laminae super- EUGENE D. BOSVORTH. posed one upon the other, and a body of gel-at AMOS C. STALEY. inous composition carried by said base plate In the presence of surrounded by and slightly protruding below 1 V. LUM ALLEN, MARY F. ALLEN.

10 the matrix the constant protrusion of said 

